Hide delete botton on edit page

app/models/concerns/internal_id.rb

@@ -7,8 +7,7 @@ module InternalId
   end
 
   def set_iid
-    max_iid = case self.class
-              when Issue, MergeRequest
+    max_iid = if self.paranoid?
                 project.send(self.class.name.tableize).with_deleted.maximum(:iid)
               else
                 project.send(self.class.name.tableize).maximum(:iid)

app/models/user.rb

@@ -440,6 +440,10 @@ class User < ActiveRecord::Base
     Project.where("projects.id IN (#{projects_union.to_sql})")
   end
 
+  def owner?(project)
+    owned_projects.include?(project)
+  end
+
   def owned_projects
     @owned_projects ||=
       Project.where('namespace_id IN (?) OR namespace_id = ?',

app/views/projects/issues/show.html.haml

@@ -45,10 +45,6 @@
       - if can?(current_user, :update_issue, @issue)
         = link_to 'Reopen issue', issue_path(@issue, issue: {state_event: :reopen}, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "btn btn-nr btn-grouped btn-reopen #{issue_button_visibility(@issue, false)}", title: 'Reopen issue'
         = link_to 'Close issue', issue_path(@issue, issue: {state_event: :close}, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "btn btn-nr btn-grouped btn-close #{issue_button_visibility(@issue, true)}", title: 'Close issue'
-        - if current_user.admin?
-          = link_to namespace_project_issue_path(@project.namespace, @project, @issue), method: :delete, class: 'btn btn-grouped' do
-            = icon('trash-o')
-            Delete
         = link_to edit_namespace_project_issue_path(@project.namespace, @project, @issue), class: 'btn btn-nr btn-grouped issuable-edit' do
           = icon('pencil-square-o')
           Edit

app/views/projects/merge_requests/show/_mr_title.html.haml

@@ -33,7 +33,3 @@
           Edit
       - if @merge_request.closed?
         = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: 'btn btn-nr btn-grouped btn-reopen reopen-mr-link', title: 'Reopen merge request'
-      - if current_user.admin?
-        = link_to namespace_project_merge_request_path(@project.namespace, @project, @merge_request), method: :delete, class: 'btn btn-grouped' do
-          = icon('trash-o')
-          Delete

app/views/shared/issuable/_form.html.haml

@@ -106,6 +106,10 @@
     = f.submit "Submit #{issuable.class.model_name.human.downcase}", class: 'btn btn-create'
   - else
     = f.submit 'Save changes', class: 'btn btn-save'
+    - if current_user.admin? || current_user.owner?(@project)
+      = link_to namespace_project_issue_path(@project.namespace, @project, issuable), method: :delete, class: 'btn' do
+        = icon('trash-o')
+        Delete
 
   - if !issuable.persisted? && !issuable.project.empty_repo? && (guide_url = contribution_guide_path(issuable.project))
     .inline.prepend-left-10

db/schema.rb

@@ -948,7 +948,6 @@ ActiveRecord::Schema.define(version: 20160316204731) do
     t.string   "unlock_token"
     t.datetime "otp_grace_period_started_at"
     t.boolean  "ldap_email",                  default: false, null: false
-    t.boolean  "external",                    default: false
   end
 
   add_index "users", ["admin"], name: "index_users_on_admin", using: :btree